For decades, Mars has been at the center of one big question: Did life ever exist there?From dried-up riverbeds to traces of organic molecules, scientists have uncovered multiple hints that the Red Planet was once very different from the cold desert we see today. Now, a new discovery is adding fresh momentum to that search — unusually high levels of nickel in Martian rocks.While it may sound like a small detail, this metal could play a surprisingly important role in understan
